Application of FT-NIR to the analysis of goat milk
2006
Drackova, M.(Veterinarni a farmaceuticka univerzita, Brno (Czech Republic) | Hadra, L. | Janstova, B. | Navratilova, P. | Vorlova, L.
The aim of this study was to determine protein, fat, lactose, total solids, non-fatty solids content, freezing point, titratable activity and pH by FT-NIR spectroscopy. Sixty samples of caprine milk were used to calibrate the instrument by partial least squares (PLS) method. Spectra were measured in the reflectance mode with a transflectance cuvette between 10,000 and 4,000 per cm, averaging 100 scans. The following statistical values were obtained: corelation coefficient (R)=0.920 and standard error of calibration (SEC)=0.094 for protein, R=0.951 and SEC=124 for fat, R=0.997 and SEC=0.011 for lactose, R=0.940 and SEC=0.260 for total solids, R=0.873 and SEC=0.159 for nonfatty solids, R=0.935 and SEC=0.003 for freezing point, R=0.952 and SEC=0.295 for titratable activity and R=0.835 and SEC=0.057 for pH. The calibration models developed were verified by cross validation. The study showed that FT-NIR is a potentially useful technique for evaluating the composition of caprine milk.
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